Form tie



Nov. 19, 1940. T. c. scHENK 2,222,339

FRM 'HE Filed may 21, 1938 INVENTOR C Scherf Patented Nov. 19, 1949 2,2,339'

Tamis C. Schenk, New York, N. Y., assigner to Richmond Screw Anchor Co., inc., Brooklyn, N. Y., a corporation of New York Application May 21, i938, Serial No. M9346 l lam. (Cl. ,Z- 131) This invention relates to form ties for the the conventional type of concrete forms, which maintenance of concrete forms in proper posimay consist of the spaced longitudinally extendtion during the pouring of concrete and subseing form boards 5 and ii, supported and reinquent setting of the same, and has for its obforced by the vertical beams l, to Which the horiject the provision of an effective tie of this charzontal beams are secured by the nails 9. The acter wherein the formation of relatively large Iconcrete mass l@ is poured between the boards 5 openings through the concrete and recesses at and 6, the spacing thereof determining the thickn the faces of the concrete by the form tie will be ness of the resultant concrete wall structure. avoided. In connection with so-called archi- The body of the form tie consists of the rod ll tectural concrete work, it is highly desirable to of relatively small cross section, said rod extendll) produce the concrete structure unmarred by relaing through the holes l2 in the form boards, and tively large openings, recesses or depressions such through the openings i3 between the horizontall as are ordinarily created by the use of many types beams 8. At predetermined, spaced-apart points of form ties and which after the forms are rein its length, the rod is formed With integral moved, must be patched. rIhle patching or fLllcollars la constituting stops, said collars forml5 ing of such openings or recesses in the concrete ing abutments for spreader plates l5, one of structure is, in work of this kind, decidedly obwhich is shown in detail, in Fig, 4. Each of these jectionable primarily because of the perceptibilplates comprises a relatively flat section of metal, ity of the patching, and accordingly, eiforts are slotted from its lower edge as indicated at i6, being constantly made to initially produce consaid slot extending above the transverse center crete work of this character as awless as possiline of the plate so that the plate straddles rod ble by the pouring operation without subsequent ll and hangs therefrom without exhibiting a patching. tendency to drop oii. The lower end of the plate The primary object of the invention therefor is curved laterally to facilitate the placement is to provide a form tie particularly adapted for and removal of the plate from its position on the use in production of the type of concrete Work rod to one side of the stops Is. One or both of described; wherein the portion of the tie extendthe ends of the rod are threaded as shown at i8 ing through the concrete structure shall be of to receive the nut i9, and when the form tie is small diameter rod of uniform thickness within POsitiOn, as hereinafter eXPlairled, sletlled out enlargements or other elements tending to Wedges 20 are forced between the nuts I9 and 30 form relatively large openings through the conthe beams 3 t0 hOld the form in Properly spaced crete or recesses at the faces thereof. position. If desired, only one end of rod H need Another object of the invention is to provide a be threaded, the other end in such case being form tie composed of a single section of rod and provided With an integral head 25 such as ShOWn provided with integral, denitely spaced1 stop in Fie. 3- 35 members or spacers which; in the use of the tie In placing the tie in position, rod II is thrust in the set-up forms, are located wholly outside through openings I2 and I3, and the Spreader of the concrete structure and act to accurately plates I5 Dlaeed .Over the rOd between the Cellars locate the forms and provide a resultant wall I4 and the inner faces of the horizontal beams 8. structure of uniform thickness, Next the wedges 20 are driven between the nuts 40 Another object of the invention is to provide a I9 and the Outer faces 0f the beams 3, such actie capable of performing the functions above set tien Spreading and holding the beams 8 apart t0 forth and being also capable of removal from the the extent permitted by the Collars I4. the form poured concrete structure Without iirst requiring beards a'laehed t0 said beams being resultarl'ly the removal or dismantling of the forms, drawn apart and maintained in the proper spaced In the accompanying drawing, wherein an emrelationship as determined by the fixed integral bodlment of the invention is shown, Fig. 1 is a collars I4 0n the rod. vertical sectional view through a concrete struc- The Concrete is 110W poured between the form ture and form therefor, showing the improved beards and permitted t0 harden. T0 remove the tie rod in position; Fig. 2 is a horizontal sectional illeY rOd II is Cut all any point between the Outer 50 view through the same; Fig. 3 is a vertical secside of the form boards 5 or 6 and adjacent tional view through a modified structure; and beams 8. Spreader plate I5 at the opposite side Fig. 4 is a iront elevation of one of the spreader of the form is now removed and the rod is then plates. drawn out of the concrete While the forms are The improved form tie is adapted for use with still in position. Since the forms remain in poslf spallin'g -tures 21 in the form tion during the removal of `the rod, breakage ofl the concrete around -the rod hole, or so-called does not take place and the removal of the rod leaves only a very small diameter hole extending through the concrete.

By the use of the fixed integral collars I4 on the rod at positions outside of the concrete structure and between the form lboards and their reinforcing beams, enlargements of any kind Within the concrete structure or near the faces thereof is effectively prevented. The result'is that the concrete structure is provided with a clean, small diameter, hole through itv which is not enlarge at the wall faces. Since the tie can be removed while the form damaging of the wall during the removal of the tie is unlikely. Moreover, since the stops ory collars I4 are xed on the rod in definite, unchangeable spaced-apart relationship, accurate spacing of the' form boards is automatic since the spacing thereof is governed by the relative positions of these stops. Consequently the use of these ties insures speedy and accurate form board erection, quick or enlargements structure.

In the embodiment oi the invention shown in Fig. 3, the ends oi the rod II are formed with enlarged heads 25 and washers 26, as a substitute for the threaded ends I8 and nuts I9 thereon, shown in Fig. 1; When heads 25 are employed instead of the removable nuts, the aperboards must be large enough to permit the passage of one of these heads to enable the rod II to be inserted. `It

boards remain in place,

ing means for its ends and beyond the form structure, the pore desired, the rod I I of Fig. l may be,provided at one of its ends with a head 25 and at its other end with the threads I8 and nut I9. Other modications may obviously be made without de` parting from the spirit of the invention.

What I claim is: 1

A form tie particularly adapted for archi.- tectural concrete work comprising, a relatively one piece rod having means for the concrete is poured, said means including denv boards, said collars comprising stop meansr be comprising split washers of constant thickness to thereby avoid spreading apart of portions of the form structure and the misalignment of form board portions thereof, wedgengaging with the rod adjacent tion of the rod disposed between, connecting'and passing through the form boards being of unlformly small diameter and without obstructions from one of the collars to the other, whereby the rod may be severed between the form boards andl collars and drawn out of the concrete structure leaving no openings at the surfaces of or through 

